I like both. NL220 seems more stable though, but it is likely due to not having to synchronize with Visio.

LonMaker
- Get Visio w/tool and when you set up the system you get a graphical representation of the layout. This makes it easy to add notes/other details and you could use the created drawing as part of the network as builts with extra details.
- Licensed to machine only.

NL220
- My understanding is it can be licensed to a machine or a dongle, so it can be 'easily' transferred between techs/machines.
- Don't have a lot of experience with this one compared to LonMaker.